package com.chiry.thread.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

@Configuration
@EnableAsync
@Slf4j
public class ExecutorConfig {
    @Bean
    public  Executor asyncServiceExecutor(){
        log.info("start asyncServiceExecutor");
        ThreadPoolTaskExecutor executor =new ThreadPoolTaskExecutor();
        //配置核心线程数
        executor.setCorePoolSize(5);
        //配置最大线程数
        executor.setMaxPoolSize(5);
        //配置队列大小
        executor.setQueueCapacity(5);
        //配置线程池中的线程名称前缀
        executor.setThreadNamePrefix("chiry-async-service-");
        //rejection-policy :当pool 已经达到max size 当时候如何处理新任务
        //CALLER_RUNS ：不再新线程中执行任务，而是调用者所在当线程中来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        //执行初始化
        executor.initialize();
        return executor;
    }
}
